h1 {
	font-size: 2em;
	font-weight: bold;
	color: #777777;
	margin: 40px 0px 70px;
	text-align: center;
}

h2 {
	font-size: 1em;
	font-weight: bold;
	color: #777777;
	margin: 40px 0px 70px;
	text-align: center;
}

body {
	background: #e0e0e0;
}

* {
	font-family: arial, tahoma, verdana;
	font-size: 11px;
}

button {
	margin: 1em;
}

table {
	margin-left: auto;
	margin-right: auto;
	text-align: center;
	border-collapse: collapse;
	border: 3px solid black;
	background: white;
}

td {
	border: 1px solid black;
	width: 60px;
	height: 60px;
	padding: 0;
}

td input {
	display: block;
	margin: 0;
	padding: 0;
	width: 60px;
	text-align: center;
	vertical-align: middle;
	border: 0;
	color: gray;
}

td input.geconcludeerd {
	font-size: 150%;
	font-weight: bold;
	color: black;
}

td input.error {
	font-size: 150%;
	font-weight: bold;
	color: red;
}

tr.dikkelijn td {
	border-top-width: 2px;
}

td.dikkelijn {
	border-left-width: 2px;
}

.solutionButton {
	font-size: 16px;
	text-align: center;
	display: block;
	margin-left: auto;
	margin-right: auto;
}

.stepButton {
	font-size: 16px;
	text-align: center;
	display: block;
	margin-left: auto;
	margin-right: auto;
}